I'm pretty sure if you're boiling down the "mindset" of an individual to a couple of words on a dust cover, something along your chain of thought is broken. I can't speak to the state of this officers mind, whether he was out to get folks that day or not. I can only say this much... it doesn't matter what color my firearms is, or if I've got some stickers or words or sayings on it (heck, I'm pretty sure there's a company making a 9mm handgun with the bill of rights written on it), If I'm going to use it to protect my life, the last thing I'm thinking about is how good or cool I look while using it.
I mean if we're gonna apply that logic then anyone buying a Ferrari or Lamborghini should get prosecuted for possibly speeding.
I will throw this in though... if you decide to modify your firearms in such a way that it may be distracting (i.e. the suuuuuuuuuuper tacticool, triple mag stacker, 15K lumen light/laser/scope/red dot combo, forend grip with bipod, 7 point sling etc) and have no idea how to properly use it and understand the implication of deadly force, then it's on you to convince to jury otherwise!